#include <stdio.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/pfvar.h>
#include <rrd.h>
#include <err.h>
#include <stdlib.h>

int main(void) {
        int dev;
        struct pf_status s;
        char *rrd[4];

        if ((dev = open("/dev/pf", O_RDONLY)) == -1)
                err(1, "open");

        rrd[0] = "update";
        rrd[1] = "/home/spaceinvader/firewall.rrd";
        rrd[3] = NULL;

        while (1) {
                if (ioctl(dev, DIOCGETSTATUS, &s) == -1)
                        err(1, "ioctl");

                asprintf(&rrd[2], "N:%llu:%llu:%llu", s.bcounters[0][0], s.bcounters[0][1], s.pcounters[0][0][PF_DROP]);

                rrd_update(3, rrd);
                free(rrd[2]);
                sleep(300);
        }
}